Lens-mounting.



J. H; BROWN.

LENS MOUNT|NG.. APPLICATION VFILED JAN. 24, I918.

Patented May 7,1918.

NITIED FaTATEd PATIENT @FFIQllh JAMES HOYT BROWN, OF NEW YORK, N. Y.

LENS-MOUNTING.

Application filed January 24, 1918.

To all whom it may concern:

Be it known that I, JAMES HOY'I BROWN, a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented a new and useful Improvement in Lens-Mountings, of which the following is a specifica- C1011.

This invention relates to eye-glass mountings.

The object of the invention is to provide a mounting which will closely fit different sizes and shapes of lens without bending or other special adjustment.

Eye-glass mountings, as usually designed, are constructed with elongated and malleable or bendable arms which extend along the edge of the lens on opposite sides of the studs. In fitting the mounting to various sizes of lenses, the Optician bends the arms slightly outward or inward until they closely engage the lens edge. The arms sometimes thereafter work or bend outward with the result that there is a loose fit between the lens and mounting In my present invention, I employ a mounting which is rigid and which nevertheless fits different sizes of lenses without reshaping.

My invention is illustrated in the accompanying drawing in which:

Figure 1 is a view of the improved mounting attached to a small lens, the shapes of two other lenses being indicated by the dotted lines. t

Fig. 2 is an edge view partly in section, of the lens and mounting.

Fig. 3 is a perspective view of the improved mounting.

Referring to Fig. 1, the numeral at represents a lens shown in full lines; 5 is a slightly larger lens shown in dotted lines; and 6 a still larger lens likewise shown in dotted lines.

The improved mounting, as best shown in Fig. 8, consists of a stud 7; arms 8 and 9 to bear against the edge of the lens, and straps 10 and 11 which embrace opposite faces of the lens and are secured thereto by a screw 12, shown. in Fig. 2. The screw 12 passes through a hole drilled in the lens at a certain distance from the edge. In case of any slight variation in the location of the drill hole of the lens resulting in a loose fit of the mounting, I provide an adjusting screw 13 in one or both of the arms Specification of Letters Patent.

Patented May 7, 1918.

Serial No. 213,492.

8 and 9. By turning the screw, a tight fit can be secured even if the lens hole has been carelessly drilled.

The improvement of the present invention consists in making the arms 8 and 9 of a length just suiiicient to cover that part of the circumference of the lens which is of the same configuration or curvature in different sizes of lens, and in making the arms rigid. In short, I have discovered that even in lenses of greatly varying sizes there is a relatively definite length of circumference, or, more properly speaking, edge, at the end, in which the edge-configuration or curvature is uniform on lenses the other edge portions of which are of different curvatures. This is illustrated in Fig. 1, wherein three lenses of different sizes are shown, yet the edge curvatures of all three in the distance from arm tip 8 to arm tip 9, as indicated by the dotted arrows, are identical. (in account of this fact, I have found that I can make the mountings of identical shape and size for three or more sizes of lenses, and can fasten them in place on all the lenses interchangeably without reshaping or altering the mounting. The drill holes of all the lenses are, or" course, located a uniform distance from the lens end. By reason of these discoveries, I am enabled to make the arms 8 and 9 rigid enough to hold the lens tight at all times. This is a great advantage over bendable arms both in respect to tightness and also in respect to the fact that the mounting is properly shaped to fit different lenses and does not have to be reshaped by the optician. The measure of rigidity which I prefer to employ in the arms is one wherein the lens will break before the arms will bend, but it is obvious that even if arms of less rigidity are used, the invention will be present if the arm length from tip to tip is coincident with that edge length of lens which is the same in shape for different sizes of lenses.

As previously indicated, mountings have been made heretofore with arms of greater reach than that indicated, these long arms being capable of being bent into engagement or parallelism with the lens edge, as will be obvious if it be imagined that the arms 8 and 9 be extended in Fig. 1 to the point where adjustment to fit large lens 6 would produce a loose fit on the lens 4:, due principally to the use of bendable arms.

I have already indicated that any adj ustment necessary through variations in drill hole location, can be compensated by turning the adjusting screW 13. This feature is one of addition to the short rigid arms and may be employed or not, as desired, although in view of a small percentage of misplaced drill-holes in lenses, it is desirable to provide the screw for use when necessary.

\Vhat is claimed as new is:

l. A lensmounting having arms shortened to a length coincident with that edgelength of lens Which is of identical shape in different sizes of lenses.

before the arms will bend.

3. A lens mounting having arms shortened to a length coincident with that edgelength of lens which is of identical shape in different sizes of lenses, said arms being sufiiciently rigid to cause the lens to break before the arms will bend, one of said arms having an adjusting screw therein.

JAMES HOYT BROWN.

Gayle: 01 this patent may be obtained for five cents each. by addressing the Commissioner of Patents,

Washington, D. C." 

